#include <stdio.h>
int main(){
    int a=100;
    //加
    printf("a=%d\n",(a+=100));//等价a=a+100
    //减
    printf("a=%d\n",(a-=100));//等价a=a-100
    //乘
    printf("a=%d\n",(a*=100));//等价a=a*100
    //除
    printf("a=%d\n",(a/=100));//等价a=a/100
    //取余
    printf("a=%d\n",(a%=100));//等价a=a%100
    return 0;
}